Apple's Developer site has been down for a couple of hours now, and while it originally seemed like the outage was related to maintenance, a few reports trickling in from developers suggests there could potentially be another cause.
Several developers are reporting that all of their developer account addresses have been updated with an address in Russia, perhaps indicating some kind of breach or serious internal error. According to multiple developer reports, their accounts list a Russian address instead of their correct address.
It's not clear what's going on with the developer site at this time. We have reached out to Apple for more information and will update this post should any new information become available.
Back in 2013, Apple's Developer Center was breached by hackers and was taken offline for several days as Apple worked to fix the breach, rebuild the developer database, and implement better security practices. At that time, Apple said sensitive personal information was encrypted and inaccessible, but some developers' names, mailing addresses, and email addresses may have been leaked.
Update: The Apple Developer site is now back up. No reason has been provided for the outage or the appearance of Russian addresses on some accounts.
Update 2: In a statement provided to MacRumors and sent out to affected developers, Apple's Developer Program support staff says there was no security breach. Instead, there was a bug in the account management application that caused address information to be temporarily displayed incorrectly.
"Due to a bug in our account management application, your address information was temporarily displayed incorrectly in your account details on the Apple Developer website. The same incorrect address was displayed to all affected developers. The underlying code-level bug was quickly resolved and your address information now shows correctly. There was no security breach and at no time were the Apple Developer website, applications, or services compromised; nor were any of your Apple Developer membership details accessed by, shared with, or displayed to anyone."